Joe asked us,
For some reason beyond my comprehension, I stopped being able to send email through my Blackberry. However, I can still receive email just perfectly fine.
If you have installed the software for either BlackBerry Desktop Redirector or BlackBerry Enterprise Server, it is possible that a Desktop [CMIME] service book is now present on the handheld. When you compose a message, the handheld may attempt to send it via the Desktop [CMIME] service book, instead of the BlackBerry Internet Service service book.
The resolution is to delete your [CMIME] service book:
1. From the Home screen on the handheld, choose Options > Service Book.
2. Highlight the Desktop [CMIME] service book.
3. Click the trackwheel and select Delete.
Note: Obviously this is only valid if you’re using Blackberry Internet Service, if you’re on a BES then you should contact your BES administrator instead.